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git01.mediatek.com / filogic / atf / 7f03e9d9d33749af1d35cbe8c346025e6f34fe64 / . / lib / cpus / aarch64 / denver.S
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Varun Wadekar28463b92015-07-14 17:11:20 +0530[diff] [blame]1/*
2 * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * Redistributions of source code must retain the above copyright notice, this
8 * list of conditions and the following disclaimer.
9 *
10 * Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 *
14 * Neither the name of ARM nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific
16 * prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <arch.h>
32#include <asm_macros.S>
33#include <assert_macros.S>
34#include <denver.h>
35#include <cpu_macros.S>
36#include <plat_macros.S>
37
38 /* ---------------------------------------------
39 * Disable debug interfaces
40 * ---------------------------------------------
41 */
42func denver_disable_ext_debug
43 mov x0, #1
44 msr osdlr_el1, x0
45 isb
46 dsb sy
47 ret
48endfunc denver_disable_ext_debug
49
50 /* ----------------------------------------------------
51 * Enable dynamic code optimizer (DCO)
52 * ----------------------------------------------------
53 */
54func denver_enable_dco
55 mrs x0, mpidr_el1
56 and x0, x0, #0xF
57 mov x1, #1
58 lsl x1, x1, x0
59 msr s3_0_c15_c0_2, x1
60 isb
61 ret
62endfunc denver_enable_dco
63
64 /* ----------------------------------------------------
65 * Disable dynamic code optimizer (DCO)
66 * ----------------------------------------------------
67 */
68func denver_disable_dco
69
70 /* turn off background work */
71 mrs x0, mpidr_el1
72 and x0, x0, #0xF
73 mov x1, #1
74 lsl x1, x1, x0
75 lsl x2, x1, #16
76 msr s3_0_c15_c0_2, x2
77 isb
78
79 /* wait till the background work turns off */
801: mrs x2, s3_0_c15_c0_2
81 lsr x2, x2, #32
82 and w2, w2, 0xFFFF
83 and x2, x2, x1
84 cbnz x2, 1b
85
86 ret
87endfunc denver_disable_dco
88
89 /* -------------------------------------------------
90 * The CPU Ops reset function for Denver.
91 * -------------------------------------------------
92 */
93func denver_reset_func
94
95 mov x19, x30
96
97 /* ----------------------------------------------------
98 * Enable dynamic code optimizer (DCO)
99 * ----------------------------------------------------
100 */
101 bl denver_enable_dco
102
103 ret x19
104endfunc denver_reset_func
105
106 /* ----------------------------------------------------
107 * The CPU Ops core power down function for Denver.
108 * ----------------------------------------------------
109 */
110func denver_core_pwr_dwn
111
112 mov x19, x30
113
114 /* ----------------------------------------------------
115 * We enter the 'core power gated with ARM state not
116 * retained' power state during CPU power down. We let
117 * DCO know that we expect to enter this power state
118 * by writing to the ACTLR_EL1 register.
119 * ----------------------------------------------------
120 */
121 mov x0, #DENVER_CPU_STATE_POWER_DOWN
122 msr actlr_el1, x0
123
124 /* ---------------------------------------------
125 * Force DCO to be quiescent
126 * ---------------------------------------------
127 */
128 bl denver_disable_dco
129
130 /* ---------------------------------------------
131 * Force the debug interfaces to be quiescent
132 * ---------------------------------------------
133 */
134 bl denver_disable_ext_debug
135
136 ret x19
137endfunc denver_core_pwr_dwn
138
139 /* -------------------------------------------------------
140 * The CPU Ops cluster power down function for Denver.
141 * -------------------------------------------------------
142 */
143func denver_cluster_pwr_dwn
144 ret
145endfunc denver_cluster_pwr_dwn
146
147 /* ---------------------------------------------
148 * This function provides Denver specific
149 * register information for crash reporting.
150 * It needs to return with x6 pointing to
151 * a list of register names in ascii and
152 * x8 - x15 having values of registers to be
153 * reported.
154 * ---------------------------------------------
155 */
156.section .rodata.denver_regs, "aS"
157denver_regs: /* The ascii list of register names to be reported */
158 .asciz "actlr_el1", ""
159
160func denver_cpu_reg_dump
161 adr x6, denver_regs
162 mrs x8, ACTLR_EL1
163 ret
164endfunc denver_cpu_reg_dump
165
166declare_cpu_ops denver, DENVER_1_0_MIDR